英语翻译

英语翻译
I used to believe in the American Dream,which meant a job,a mortgage（按揭）,credit cards,success.I wanted it and worked toward 【it】 like everyone else,all of us separately chasing（追求）the same thing.
One year,through a series of unhappy events,【it】all fell apart.I found myself homeless and alone.I had my truck and $ 56.I searched the countryside for some place I could rent for the cheapest possible amount.I came upon a shabby house four miles up a winding mountain road over the Potomac River in West Virginia.
第一段中【】里的it代指什么?
第二段中【】立的it代指什么?后面还有个all,单数的后面用all如何解释?
标准翻译it所在的2个句子,